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arXiv 2411.02493astro-ph.HEastro-ph.SR
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亮型II短平台超新星SN 2023ufx:部分剥离的大质量前身星的非对称爆炸

Luminous Type II Short-Plateau SN 2023ufx: Asymmetric Explosion of a Partially-Stripped Massive Progenitor

Aravind P. Ravi, Stefano Valenti, Yize Dong, Daichi Hiramatsu, Stan Barmentloo, Anders Jerkstrand, K. Azalee Bostroem, Jeniveve Pearson, Manisha Shrestha, Jenni… 展开作者

Aravind P. Ravi, Stefano Valenti, Yize Dong, Daichi Hiramatsu, Stan Barmentloo, Anders Jerkstrand, K. Azalee Bostroem, Jeniveve Pearson, Manisha Shrestha, Jennifer E. Andrews, David J. Sand, Griffin Hosseinzadeh, Michael Lundquist, Emily Hoang, Darshana Mehta, Nicolas Meza Retamal, Aidan Martas, Saurabh W. Jha, Daryl Janzen, Bhagya Subrayan, D. Andrew Howell, Curtis McCully, Joseph Farah, Megan Newsome, Estefania Padilla Gonzalez, Giacomo Terreran, Moira Andrews, Alexei V. Filippenko, Thomas G. Brink, Weikang Zheng, Yi Yang, Jozsef Vinko, J. Craig Wheeler, Nathan Smith, Jeonghee Rho, Reka Konyves-Toth, Claudia P. Gutierrez

AI总结:

本研究发现具有已知最短平台期的亮IIP型超新星SN 2023ufx,其前身星为部分剥离的大质量红超巨星,爆炸非对称且镍产量异常高,需星周物质拟合早期光变。

摘要:

我们介绍超新星(SN)2023ufx,这是一颗独特的IIP型超新星,具有已知最短的平台持续时间($t_\text{PT}$约47天)、明亮的V波段峰值($M_V$ = $-18.42 \boldsymbol{\frac{+}{-}}$ 0.08 星等)以及快速的早期下降速率($s1$ = 3.47 $\boldsymbol{\frac{+}{-}}$ 0.09 星等(50天)$^{-1}$)。通过将观测到的测光数据与流体动力学MESA+STELLA模型网格进行比较,我们将前身星限定为零龄主序质量$M_\text{ZAMS}$约19-25倍太阳质量的大质量红超巨星。与星云光谱模型的独立比较也表明,其初始氦核质量约为6倍太阳质量,因此前身星质量较大。对于IIP型超新星而言,SN 2023ufx在爆炸期间产生了异常高含量的镍($^{56}$Ni),约为0.14 $\boldsymbol{\frac{+}{-}}$ 0.02倍太阳质量。我们发现,SN 2023ufx的短平台持续时间可以用小氢包层($M_\text{H\textsubscript{env}}$约1.2倍太阳质量)的存在来解释,这表明前身星发生了部分剥离。为了拟合早期(约10天以内)的伪热光变曲线,需要约0.09倍太阳质量的星周物质(CSM),这些物质来自前身星晚期恒星演化的质量损失。[O I] $λλ$6300、6364、Hα以及[Ca II] $λλ$7291、7323的宽峰和多峰成分的星云谱线诊断表明,SN 2023ufx的爆炸本质上可能是非对称的,物质优先沿我们的视线方向抛射。

英文摘要:

We present supernova (SN) 2023ufx, a unique Type IIP SN with the shortest known plateau duration ($t_\mathrm{PT}$ $\sim$47 days), a luminous V-band peak ($M_{V}$ = $-$18.42 $\pm$ 0.08 mag), and a rapid early decline rate ($s1$ = 3.47 $\pm$ 0.09 mag (50 days)$^{-1}$). By comparing observed photometry to a hydrodynamic MESA+STELLA model grid, we constrain the progenitor to be a massive red supergiant with M$_\mathrm{ZAMS}$ $\simeq$19 - 25 M$_{\odot}$. Independent comparisons with nebular spectral models also suggest an initial He-core mass of $\sim$6 M$_{\odot}$, and thus a massive progenitor. For a Type IIP, SN 2023ufx produced an unusually high amount of nickel ($^{56}$Ni) $\sim$0.14 $\pm$ 0.02 M$_{\odot}$, during the explosion. We find that the short plateau duration in SN 2023ufx can be explained with the presence of a small hydrogen envelope (M$_\mathrm{H_\mathrm{env}}$ $\simeq$1.2 M$_{\odot}$), suggesting partial stripping of the progenitor. About $\simeq$0.09 M$_{\odot}$ of CSM through mass loss from late-time stellar evolution of the progenitor is needed to fit the early time ($\lesssim$10 days) pseudo-bolometric light curve. Nebular line diagnostics of broad and multi-peak components of [O I] $λλ$6300, 6364, H$α$, and [Ca II] $λλ$7291, 7323 suggest that the explosion of SN 2023ufx could be inherently asymmetric, preferentially ejecting material along our line-of-sight.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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